crow quill
noun
1- a large feather from a crow's wing（乌鸦翅膀上的）鸦羽, 乌鸦羽毛。
1.1
- historical a quill pen for fine writing made from such a feather〈史〉乌鸦羽毛笔。
1.2
- （亦作crow-quill pen）a small fine pen for map drawing（绘制地图的）细笔。